单项选择题

Questions 18 to 20 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now listen to the passage. Why is the author attracted by Hank Walker’s pictures

A.Because they are about the Kennedy brothers.
B.Because they are still.
C.Because they display many objects.
D.Because Hank Walker was a famous photographer.